Research On Optimized Strategy Of Reheating Furnace’s Heating Quality

The Steel Rolling Production Line (SRPL) is an important stage of the iron andsteel industry. As the initial facility of the SRPL, the reheating furnace’s heatingquality for slabs and energy consumption respectively have a positive relation to thequality of SRPL’s products and its benefit, so it is an important subject to research onthe technology of the reheating furnace. Experts at home and abroad have taken adeep research on equipment, technology and control method, and have gainedsubstantial achievements. Based on these achievements, the thesis solved the problemof furnace temperature regulating in order to improve the heating quality and reduceenergy consumption. An accurate regulation can promise the slab an expected tappingtemperature and avoid energy waste caused by the big fluctuation of furnacetemperature. This thesis solved the above problem in the following ways.Firstly, this thesis introduced the development of research methods on reheatingfurnace. On that basis, the thesis discussed the reheating furnace automaticcombustion control (ACC) system, coming to the conclusion that the slab’s calculatedtemperature plays a very important role in the ACC system.Secondly, this thesis established the tracking model of the slab’s temperature onthe basis of heat transfer theory and numerical heat transfer technology. Based on themodel, the thesis took Genetic Algorithm (GA) to improve the total exchange factor,the key factor of the model, to get accurate calculated temperature. According tocharacteristics of the total exchange factor, this thesis improved the GA to promise anoptimal algorithm. After that, it took MATLAB programming with C++to finish theprogram of GA and then put the data from Data Logger Experiment into the programto get several results. After analyzing the results, the thesis concluded that the modelhad been evidently optimized by the improved GA.Finally, based on the improved tracking model of the slab’s temperature, thethesis introduced the working principle of modules in cycle processing, as well as thelogical relationship among them. After that, the thesis showed the flow and the meansabout how to program to realize cycle processing. Based on the above, the project waswell fulfilled to realize the automatic and accurate regulation of furnace’s temperature. At last, results from the field were showed and analyzed to demonstrate the tragedy tobe valid and practical.